By Henri J. Dumont, Tamara A. Shiganova, Ulrich Niermann
The Mediterranean, Black, and Caspian Seas, the rivers and canals that attach them, and the big quantity of delivery within the sector, symbolize a conduit for aquatic invasion, whose outcomes are just now commencing to be understood. This booklet offers an updated evaluate of jelly invasions within the Ponto-Caspian that have affected neighborhood ecosystems because the early Nineteen Eighties, contrasting that with different organic invasions, looking for underlying principles.
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Extra info for Aquatic Invasions in the Black, Caspian, and Mediterranean Seas
M-2 ± 134 (9 ind. m-3) and its biomass to 445 ± 121 g m-2, at a Beroe abundance of only 27 ± 25 ind. 5 ind. 4 ± 33 g m-2 (Fig. 2C, 5). By 10-14 September M. leidyi almost disappeared from Gelendzhik Bay. We observed individual Beroe trying to ﬁnd Mnemiopsis and biting at plastic bags. Already on 14 September motionless swarms of Beroe was observed sank to the bottom at a depth of about 15 m. From 4 to 14 September, experiments on Beroe reproduction were performed in aquaria. At good prey concentration in natural conditions, freshly collected individuals of Beroe of 48-70 mm length had a fecundity (egg production per day) of 513-3000 eggs at a salinity of 17‰ and temperature 23°C.
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